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| Number | Title | Issue Date |
| 6469666 | Digital antenna goniometer and method A digital goniometer and steering method are provided which may be used, in a preferred embodiment, for producing a figure-eight antenna reception pattern oriented at any selectable angle. The digital goniometer works with the signals from a pair of ortho... | 10/22/2002 |
| 5812092 | Radiocommunications and localizing device A radiocommunications and localization device of the type comprising an array of antennas coupled respectively to a goniometer device and a radio receiver delivering phonic signals to an operator respectively on two headphones. This device includes a devi... | 09/22/1998 |
| 5790075 | Beam antenna direction measuring method, direction measuring device and antenna direction controller In order to determine the direction of a beam antenna, at least one magnetic detection device is attached to the beam antenna for measuring at least one of the horizontal and vertical components of the geomagnetic field. Maximum and minimum geomagnetic fi... | 08/04/1998 |
| 5030959 | Enhanced automatic bearing indicator system An improved apparatus and method for radio direction finding is set forth, the generic function of which is that of an "automatic bearing indicator" (ABI). The technique and apparatus are intended for use in association with an antenna system which provid... | 07/09/1991 |
| 4654664 | Electronic null-seeking goniometer for ADF Described herein is a system providing an electronic null-seeking goniometer for use in automatic direction finding equipment. A microprocessor is used to generate sine and cosine information in response to the detected phase of the bearing signal. The mi... | 03/31/1987 |
| 4197542 | Radio navigation system An electronic navigation system ground station, which may be either an omni-range beacon (such as VOR) or a passive direction finder. A circular array of antenna elements has a feed arrangement which includes switched programming of at least one discrete ... | 04/08/1980 |
